Disk sharpener



R. H. WEIRICH DISK SHARPENER Aug. s, 195o 2 Sheets-Sheet 1 Filed June 15, 1946 Ina-5 JNVENToR. RAYMDND H. WmnIcH sharpener nas/.ing individuel -ponxer vPatented AugrS, 1950 l PATENT, 1 orne-,1e

' g,.517,950. msn snsnlininn` e narmqningweirnnroledoiloiiie. Application June-13, i946', SerialNm 676,387.l 4. (Anims (citi-.1195),

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o. grinning eilt. t

" This invention relates eene; oi: dise @ironia/rl luminari,` eine, parti?, blades oli nerrowsorth lik "Ani obj ent Qi: this: lll ...elQIl is: t9 PlOdllG. sflflell' an@ iinnnovedrgrinier for s neningfoneonniore uisebiadeswitnouttneir nre ions disengagement fromE the mounted position,

nnotherobjpeot, of; this. intentie is to produoe yav disebiaeeshamener consisting-o reletliielyiew l simple partsreadilyfnssembled toinrovie e. .Sturdy portablegrinderl adapted mln te `sheni'ler-1, disosfwiiileinghelmoiinteclpos AA objectw is; tot `produeef one.y blfide menne seperately` to ,diziy,elhed cibleidges: ailldf the grinds ing wheel andi adapted.,siinultelneouslnenl unis ro'rmlytol sharpenone ormone diseblndes.

'Enesaanfi other obieo. `will:hereineifter appear and for purposes ot illust ion, butnot offlimitaftion?, embodiments .off the' -inyention ,are in l t the= eeomnanuingdreiwings in which; v

s Figures-1 isleJ tonplan viewnot' the Sharpening devine-in position tor` grinding; tliegdise. binden` of afharrow;

1 Figuren isa `lseetionel:'elevati:noel 4View oifvithe l posedtlireotionn l Eer the enoloseel flanged section off eeich I-beam.

rie,W materiel is sliriably mounted on eacnside o Il and il, respectively; by meansof a clamp seourecl to the, underside. of the biooklnnd" for purpose clamp, 2 2;y consists, of a; metalliostrip gi lli-,S ende-2.31am Z13. down-turned sonas. to

turntable tai-leenrv along the line ,2112 of Figure l:

Fgure'is. aside eleuetional View, oi one power meanswmounted inelignment Withtlieadli-Men disc, blades; i

Eigure 4 ,is en ,detaileds View ortlie split: pulley mounten ontlie bloote. sheit, for rotation there` with? Figure 5 is e. sectional View line mzoifli'igure 4r:

Figurev ,61 is anpsrspeoiiuee fuient` of n. mounting taken along" the braokemfon interconnecting lndfjeoent Iebeems l oomprising, v part .ont-ne mountingl treme,` and'v Figure 1 isfafperspective. View: oftloe2 blade.- shaft supporting block mounted on an I,loea,m,V i 1 @nel-illustrated embodlmentof the invention ooinnrlne l .oilletetell ineeeel nllel` l--benrnsQ ll entlik elisnneef tbe etonne tliedireotion-oerpew eieoler to. tbe-,nistbeem end. in.L e. manner enabling, einnimmt-ot one beamielntive to the eoeetfng'on .lorrneolnlieet inetnletelnpm il tneletter, tbe-onnositoly extending ensei. einen, l5.. en@ In andt ll oie erOSs-sbeped stamping, ,lit ere ioldeli nnoninenneltee one enooorting irene eoneisting. oi? b t Inn nil etal-nente. v in t ef este l ,smelled .Stables otuiete support of the oneretineelenient., ,Y Eer-t.I nur pose, a; pair of metal connectors seurlyfjoin 45 nleross listenin. ,ltwitnone end. portion of e noir olinerseoie Tlie-roetnl oonneetorQmey/be t Movido: ncnchnlinel 241 having the contour of the nangegr section either-,beam tobe disposed thereeet; ecrewe 2-5 in the clamp, adjustable -for t; with the. beam, militates against the 'Vee tllimonement; of theslolook from the @position lheiiistance between the parels. lel side beams I! and I2 is arranged so thatthe J'QlJ-lzllal bQXes 26, snppoirtmg the freely roteil'feble. ,shaft 2l, may seat in the grooves 2.1' de ned-.1 bythe upright armsf28. of a metallic liiflillel mmbel 219:, .sefnired` by screws 3l):y to the llxppensuiffag of enen supporting loloelr` 24:. Thus',-

3h in: the grinding position, are. supp9 ,eel erwayf from the groundl in` a manner noli.- tins egeinet their 'relative 1ongi'udina1 mollmfmlt bll't enabling freer rotational movenient. Y @illigflll mOi/lenient, is, imparteds to` the shaft 3i". yf newelmenns E?- consisting oi` an. electric motor 3.2: operatively joined: with a reducer 33 lhIQllgzli @Xin Y aligned: flexible couplingu means Minne? Ch; are adjustably mounted on a supe llllitflgrlplnlier positioned on .oneinner end llllli 911i: @f` Side beam as by clamping means previously: fiese no Lea-1b io s onliey secured toeneemt portionof e. rotatable slaaftxfl lextending from the `reducer u n; of stnndarcloonstructiom con-- ei oie; nei Ot Substnntiallyfsemifoiroulerf peeronneel .seotions A end; 13,. enen none ine en integral eentrel hub, portionelgreovecl eemple, t one pair off ovnis prighfffnbleelg 2gb of Wood',v metalor other bed? in conneotionfwith the sup-l o endless beltSEroperatively One other means, illustrated in Figure 3, for

actuating the shaft 21 comprises the elements previously described, but instead, the motor 32' and reducer 33 are mounted in alignmentwith the shaft 21 so that chuck 360 positioned on the end of the reducer may operate releasably to engage the outer end portion of the shaft to impart rotational movement thereto. The plate or bed on which the motor 32' and reducer 33' are mounted, is suitably secured to a beam 355', one end portion of which is supported by a standard 35|" and the other end of which is clamped to an I'bearn.

A grinding unit is mounted for sliding movement on the cross arm I0, different positions of the unit being illustrated by the solid and broken lines in Figure l, and consists essentially of an electric motor actuating means 43 for driving a grinding wheel lili secured to the end of an elongate shaft 45 intermediately supported by a bearing 4S and operatively connected to the spindle 41 of the motor through a iiexible coupling 48. The above parts are vassembled to comprise a unitary structure on a mounting plate 49 As illustrated in Figure 1 of the drawings, the

grinding assembly G is mounted on 'the cross beam I 0 in a manner to direct the rotating grinding Iwheel 44 towards engagement with selected disc 3|.

For the purpose of enabling free rotational movement of the grinding unit G, a turntable T is provided consisting of a block 53 having a central transverse groove 54 contiguous with a channel groove 55 having a contour similar to `that of the upper portion of the I-beam I0 enabling sliding movement of the block relative thereto. Set'screws 5B, threadably engaging vapertures 51 through the underside of block, are adapted to bear against the fianges of the I-beam when in the desired position of lateral adjustment, militating against subsequent relative movement thereof until such time as the screws are again retracted from engagement with the-I-beam IIJ; A vcentral-pillar 53 integral with another upwardly. extending pillar 59 of smaller diameter provides Va shoulder Bil there-between on which seats one race of an antifriction rollerbearing 6I. The other race engages an internal shoulder formed by the side walls 62'and an annular ridge 63 of an inverted cup-.shape member 54 disposed over and-spacedfrom the concentric pillars. The cup-shaped member64 is firmly positioned in the vertical plane relative to the supporting block by means of a flathead bolt 65 adapted loosely to fit through a central aperture 66 in the cup-shaped member and threadably to e11- gage a threaded aperture 81 in the upper pillar 59. A roller bearing 68 disposed between the underside of the flat head bolt and the upper surface of the cup-shaped member enables free relative rotational movement therebetween. In this manne-r the cup-shaped member 64 is firmly positioned and yet is rotatable independently of its support. Counter-sunk screws 59 disposed through the side walls E2 of the cup-shaped member threadably engage the mounting plate 49 which is apertured in a manner enabling the turntable T to be disposed therein.

In operation the side beams I| and I2 rst are disposed on the ground in a direction perpendicular to the axle 21 and in alignment with each journal box 26, and they are interconnected in that position by the superposed cross beam I!! by means of the connectors C previously described. The upright blocks 2| are then positioned on each side beam I I and I2 and the shaft 21 raised so as to dispose the journal boxes in the channels 28 enabling the shaft 21 and mounted discs 3| to be rotated freely by one of the power means described. Thereafterlthe turntable T-with attached mounting plate 49 may be shifted transversely on the cross beam I0 to the predetermined position of adjustment to provide the desired angular relationship between the grinding wheel '44 'and the discs 3|. The independent actuating means enables uniform rotational movement of the disc and grinding wheel respectively, the coil spring 5||l urging the members towards engagement with each other with equal force so that uniform grinding is obtained throughout the periphery of each blade 3|. It is manifest that the grinding unit G may be shifted laterallyon the beam I0, thus to engage thev front or rear of each blade as desired.

From the above description, it is manifest that I have produced a simple device for sharpening the-disc blades of a harrow or the like, in a manner which does not necessitate disconnection thereof from the traction means and from a direction that does not conflict with the frame work of the farm`machinery. The device combines relatively few readily available elements that are easily assembled into a unitary sturdy structure particularly adapted for the purposes desired. In addition, y.flexibility and adjustment of the grinding forces and grinding angle may be made without effort or the expenditure of considerable time.

Thus I have produced a simple, portable but compact unit for .grinding blades of various elements and particularly the disc blades of a harrow without the'need of transporting the more cumbersome machines to a central processing location. 1

Itis to-"b'e understood that numerous other changes maybe made in the details and construction arrangement and operation without departing from the spirit of the invention especially as defined in the appended claims.

yWhat I claim is:

1.1A disc grinding device comprising a disc carrying shaft, a pair of spaced parallel supporting frame membersA disposed substantially at rightangles to the disc carrying shaft, a cross arm connecting said members and adjustable longitudinally thereof, a block releasably mounted on each ofA said members for supporting the disc carrying shaft,` a grinding wheel, a turntable mountingsaid wheel and translatorily shiftable transversely von said cross arm, means for securing said turntable against translatory shifting movement, spring means connecting the turntable and cross arm for urgingsaid grinding wheel into engagement with a disc, and individual driving means for the disc carrying shaft;

2, A disc grinding device as claimed in claim 1, in which the supporting frame members and cross arm comprise I beams, and brackets connecting said cross arm to each frame member, said brackets being adapted slidingly to fit a anged portion of each adjacent beam respectively, and set screws in said brackets engageable with said beams for locking same vin the assembled position. 4

3. A disc grinding device as claimedin claim 1, in which' the blocks comprise rigid pillars l5 having a frame member engaging bracket on one end and a channel onthe other mounting the disc carrying shaft, and set screw means for releasably securing said bracket in position.

4. A disc grinding device as claimed in claim d 1, in which the turntable comprises a block having a groove adapted slidingly to engage vsaid crossarm, means for locking said block in the desired position of sliding adjustment, integral hub sections of large and small diameter respectively, an inverted cup-shaped member disposed over said hub sections, anti-friction means between the cup member and hub sections, a bolt disposed through an aperture in said cup member and threadably engaging said hub sections, and anti-friction means disposed between the head of said bolt and said cup-shaped member.

RAYMOND H. WEIRICH.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

